CVE-2026-55967 — HIGH (7.5)

Vulnerability Description

AES-GCM encryption/decryption with extremely large cumulative single message sizes (>64 GiB) were not properly rejected by the streaming APIs, allowing counter wrap, keystream reuse, and consequent plaintext recovery.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Wolfssl	Wolfssl	>= 4.8.0, < 5.9.2

Related Weaknesses (CWE)

CWE-323

References

https://github.com/wolfSSL/wolfssl/pull/10709Issue TrackingPatch
https://www.wolfssl.com/docs/security-vulnerabilities/Vendor Advisory

FAQ

What is CVE-2026-55967?

CVE-2026-55967 is a vulnerability with a CVSS score of 7.5 (HIGH). AES-GCM encryption/decryption with extremely large cumulative single message sizes (>64 GiB) were not properly rejected by the streaming APIs, allowing counter wrap, keystream reuse, and consequent pl...

How severe is CVE-2026-55967?

CVE-2026-55967 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-55967?

Check the references section above for vendor advisories and patch information. Affected products include: Wolfssl Wolfssl.